Cryptocurrencies, such as bitcoin and Ethereum, are digital currencies that are not issued by any government or central bank. They can be traded on exchanges and used to buy products online and in some physical stores (though they're still mostly used for speculative trading).
Cryptocurrencies are not legal tender. In other words, you cannot use them to pay taxes. There's no guarantee the value of a cryptocurrency will hold up over time. Many have been hacked or shut down due to security concerns. You'll also want to make sure your wallet is secure against theft. It is because if someone gains access to your private key, they could transfer all your funds and leave you with nothing but an empty wallet!
